Improvement in earth-augers



R. B. PALMER.

Earth-Angers.

Patent'ed May 5,1874.

W5.- 1 INVENTOR I l v Attorneys.

ITNTTED S'rA'rEs PATENT OFFICE.

RICHARD B. PALMER, OF GHAMPAIGN CITY, ILLINOIS.

IMPROVEMENT IN EARTH-AUGERS.

Specification forming part of Letters Patent No. 150,601, dated May 5, 1874; application filed March 10, 1874.

- To all whom it may concern:

Be it known that I, RICHARD B. PALMER, of Ohampaign City, in the county of Champaign and in the State of Illinois, have invented certain new and useful Improvements in Earth-Boring Angers; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of an earthauger, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring; to the annexed drawing, in which- Figure 1 is a side elevation, and Fig. 2 a vertical section, of my earth-auger. Fig. 3 is a cross-section of my earth-auger through the line as m, Fig. 1.

The cylinder of my earthauger is made in two parts, A and B, the former of which has the bottom 0 secured to it. The part B is bolted to the part A for the purpose of lifting sand and slush when boring in that kind of earth. This part is used in connection with a false bottom, D, to which is attached a valve, E, to admit the filling of the cylinder with sand or slush. The false bottom D is supported by means of a rod, a hooked to a staple, 1), near the top of the cylinder. By unhooking this rod the false bottom will fall, thus allowing the contents of the cylinder to pass out without removing the part B of the cylinder. One edge of the part A of the cylinder is turned over inward, forming an air-tube, cl, the entire length of the cylinder, to conduct air from the top to the bottom thereof.- The main bottom (3. of the auger is curved, as shown, allowing the air to pass freely from the lower end of the cylinder, underthe bottom of. the auger. This curve forms acomplete air-chamber, that cannot be stopped up when boring, thereby preventing all suction when raising the auger. The inner or upper side of the bottom 0 is a continuous mole-shaped twist, and is made concave the twist extending one and one fourth around, thereby facilitating the filling of the long cylinder with earth. It will also be seen that about three-fourths of the bottom is lifted above the cutting-bit e sufficiently high to allow a large bowlder to pass in the auger almost as large as the cylinder, and can not get back, as the cutting-bit passes clear under it, which is very important to raise large bowlders out of the way. On the side of the bottom G is attached a knife or spur, G, for the purpose of cutting the earth from the wall on one side as deep as the bit cuts it on the other, so that the bit of the auger only has to make the under cut, to lift the earth free, thus avoiding clogging in the mouth of the bit or anger.

I am aware that the use of an air-tube in connection with an earth anger is, broadly speaking, not new; hence I disclaim such as being my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

have hereunto set my hand this 4th day of February, 1874.

' RICHARD B. PALMER.

Witnesses:

G. L. EVERT,

JOSHUA DrcKnRsoN. 

